Г)м=5/12 - 4/15 = 25/60 - 16/60
м=9/60
а)36/60 - 15/60 + 20/60=21/60+20/60=41/60
б)6/18 - 2/18 + 3/18=4/18+3/18= 7/18
в)(12/9+1/9) - 13/18=13/9-13/18= 26/18-13/18= 13/18
г)6/8 - 4/8 + 7/8=2/8+7/8= 9/8
д)10/12 - 8/12 + 3/12=2/12+3/12= 5/12
е)1/3 - (2/18 + 3/18)= 1/3-5/18=6/18-5/18= 1/18